DNA examinations will on Monday be conducted on the eight students who perished during a fire at the Moi Girls School in Nairobi to help in identifying them.
Seven girls were killed in Saturday's blaze and two others later died of their injuries.
"We can not resolve a conflict in a school, or a conflict on the headship of a school, by burning the school", he said. REUTERS/Baz Ratner Investigators stand inside a cordon line following a fire that burnt down one dormitory of Moi Girls school in Nairobi, Kenya September 2, 2017.
The fire started at around 1.30 a.m. and according to some witnesses emergency services arrived nearly two hours later.
16 other students were admitted at various City hospitals with reports that three of them are fighting for their lives in the Intensive Care Unit.
The school, which has more than 1,000 students, will remain closed for two weeks while the investigation takes place.More news: Alvaro Morata Doesn't Think Much Of 'Sloppy' Premier League Defenders
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"My daughter has not eaten anything since Saturday morning after receiving the news of the deaths of her classmates", said one of the parents.
Fires have in the past claimed the lives of dozens of Kenyan boarding school students.
The families affected, as well as the school and all who wish it well, can be sure that we will investigate the matter fully, and act appropriately, so that this sort of tragedy doesn't recur.
"Police have assured us that there are very useful leads in the direction of specific suspects and we will know in due course who these suspects are", said Matiangi, who is also acting interior minister.
Last year, at least 126 high schools were struck by arson in what appeared to be protests by students over the shortening of holidays and the limiting of visits by parents.
Matiangi took those measures after widespread cheating in 2015 high school final-year exams.